Electron-enriched thione enables strong Pb-S interaction for stabilizing high quality CsPbI₃ perovskite films with low-temperature processing.

ABSTRACT: Cesium lead iodide (CsPbI₃) perovskite is a promising photovoltaic material with a suitable bandgap and high thermal stability. However, it involves complicated phase transitions, and black-phase CsPbI₃ is mostly formed and stabilized at high temperatures (200-360 °C), making its practical application challenging. Here, for the first time, we have demonstrated a feasible route for growing high quality black-phase CsPbI₃ thin films under mild conditions by using a neutral molecular additive of 4(1H)-pyridinethione (4-PT). The resulting CsPbI₃ thin films are morphologically uniform and phase stable under ambient conditions, consisting of micron-sized grains with oriented crystal stacking. With a range of characterization experiments on inter

SUBMITTER: Xu X 

PROVIDER: S-EPMC8157470 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature